.scrollTop {
  width: 30px;
  height: 30px;
  display: flex;
  background-color: red;
  color: white;
  justify-content: center;
  align-items: center;
  position: fixed;
  right: 20px;
  bottom: 100px;
  padding: 10px;
  border-radius: 10px;
  cursor: pointer;
  transition: 1s;
  opacity: 0;
  transform: scale(0.2);
}

div.show {
  opacity: 1;
  bottom: 20px;
  transform: scale(1) rotate(720deg);
}
